Sheet-metal radiator.



No. 742,672. PATENTED 00T. 27,1903.

W. R. KINNEAR.

SHEET METAL RADIATOR.

APPLICATION FILED MAB.. 1B, 190:.5.

)l0 MDEL. 2 SHEETS-SHEET 1.

A u @j lvwentoz No. 742,672. PATBNTED 00T. 27, 190s.

77.211. KINNBAB..

SHEET METAL'RADIATOB. APPLIUATION FILED MAR. 18. 1903. No MODEL. v 2SHEETS-s111121: z.

Hw i' me Nonms Prrzns co. Puma-Luino.. WASHINGTON, n. c.

ivo. 742672.

UNITED Y STATEs Patented October 27, 1903.

PATENT rricn;

SHEET-METAL RADIATOR.

SPECIFICATION forming part of Letters Patent No. 742,672, llated October27, 1903.

Application filed March 18, 1903. Serial No. 148,396.

(No model.)

To all whom it may concern:

Be it known that I, WILLIAM R. KTNNEAR,

a citizen of the United States, residing at Columbus, in the county ofFranklin and State of Ohio, have invented certain new and usefulImprovements in Sheet-Metal Radiators, of which the following is aspecification. f My inventionrelates to radiators constructed of sheetmetal, and has for its object to provide certain novel features ofconstruction whereby radiators may be constructed of sheet metal withgreater facility and a more substantial structure will be obtained.

My invention will be fully understood upon reference to the accompanyingdrawings, in which- Figure 1 is a vertical transverse section of aradiator unit constructed in accordance with my present invention andembodying some of the features thereof. Fig. 2 is a vertical sectionthrough two connected radiator units in which the several features of mypresent invention are embodied. Fig. 3 is a horizontal section on theline 3 3, Fig. 2. Fig. 4 is an enlarged sectional detail view of theupper end of a radiator unit. Fig. 5 is a sectional detail View of aconnection between two units of a radiator, and Fig. 6 is a detailsectional view of the means for sustaining the opposed inner walls'of aradiator unit against bulging under internal pressure.

My invention relates to that type of radiators in which the unit isconstructed of inner and outer tubular members placed one within theother, suitably spaced apart so as to leave a chamber between them forthe heating medium and having their upper and lower ends suitablyconnected so as to close said chamber.

A represents the outer member, and B the inner member, of a radiator ofthis type, while C is the chamber between said members which receivesthe heating medium. In closing the upper and lower ends of the chamberC, I have heretofore proposed to deflect the metal composing the walls,so that they may be brought together and united by suitable seam. Undersome conditions it is not convenient to obtain the necessary flaring ofthe inner member to bring its edges against the edges of the outermember. One feature of my present invention therefore consists inintroducing a connecting-piece 1, which is seamed at 2 to the innermember and at 3 to the outer member, the piece 1 being formed f1aring,soas t'o maintain the distance between the inner and outermembers, whileconnecting them together. This connect-ion may be employed to advantageat both top and bottom, and the specific construction thereof ispreferably that which is shown more clearly in Fig. Lithat is to say,the upper edge of the inner member is formed with a downturned lip 4,while the filling-piece 1 is provided with a groove 5 to receive saidlip and with a shoulder 6, that projects over the end of the innermember sufficiently to prevent downward displacement of thefilling-piece l, the connection with the outer member A being effectedthrough means of an inner downturned lip 7,

which receives a vertical ange 8 on the filling-piece l, and a crimp orannular shoulder 9 on the outer member extending beneath the flange Ssufficiently to prevent displacement of the latter. The connection madeas above described is di-pped in a soldering, galvanizing, or othersuitable bath, which hermetically closes the joints and cements themetal together.

In radiators as heretofore devised by me I have described connections Dbetween the opposed faces of outer members A in adjacent units of aradiator, the connections between the members A, and the pipes forconveying the heating medium to and from the radiator. These connectionshave been constructed in various ways, which are quite eective for thepurposes intended; but another feature of my present invention consistsin a novel construction of these connections, which is illustrated moreclearly in Fig. 5, wherein the outer members A are provided withhorizontally-projecting iianges 10, while fitted within saidviianges arethimbles 11, projecting beyond the flanges and formed, respectively,with a tongue 12 and groove 13, lying substantially in a vertical plane.The tongue-and-grooved extensions on the thimbles l1 are proportioned sothat the tongue and groove abut against the edges of the anges 10 andsecurely lock the thimbles in connection with their iiared inner Iopoends 14. At the same time the outer side 15 of the groove 13 overlapsthe outer end of one of the ilanges 10 and gives additional tightness tothe joint. The joint, constructed as described, is dipped in a suitablesoldering, galvanizing, or other bath in order to permanently close thejoints and connect the parts. This form of joint between units isparticularly desirable, because it permits the use of heavy and highergrade or different quality of metal for forming thc connection thanwould be possible if the connection is in previous applicarestricted ifthe circulating-fine is to be made entirely of metal taken from thewalls of the inner member. Another feature of my present inventionconsists in forming its respective ends to form shoulders 17 and lockinggrooves 18, while the metal surrounding the openings formed in the innermember B is turned inward and then radial with respect to the axis ofthe line, so as to form tongues 19, that fit the grooves 18. When themembers are secured together, as shown in Fig. 4, one portion of eachgroove 18 abuts against the walls of the'member B, while the otherportion of said groove forms a shoulder on the opposite side ofthetongue 19, and the whole structure, in addition to affording convenientand eective structure of the tine, securely ties the walls together andsustains them against buckling in either direction.

When sheet-metal radiators are used in steam heating systems, andparticularly when constructed on double tubular plan, it is desirable tohave some means for sustaining the opposite walls of the inner memberagainst internal pressure of the heating medium, in order that saidwalls may not be forced together and restrict the vertical airue throughthe radiator unit. A further feature of my present invention consists inintroducing compression members 20 of tubular form at suitable pointsand in suitable numbers between the opposed walls of the innerv memberB, these compression members being preferably of tubular form and beingsustained in position by hemispherical or convex bosses 21, struck upand projecting inwardly from the walls of the member B. The bosses 21are made to tit the tubes 2O and hold them rigidly in position, theseparts being preferably still further set ber being constructed withtending peripheral groove der overlapping the tongue of thefillingpiece, :parallel and in contact portion of the filling-piece toprevent the of the anges on l formed on said cured together by thesoldering or ga'ivanizing bath to which the entire radiator ispreferably subjected.

22 represents abutting bosses struck up and projecting outwardly fromthe outer members A in such position that they come together when theradiator units are united and add rigidity to the structure. These formno part of my present invention, as they are described and claimed inanother application tiled by me.

Having thus described the invention, the fol-lowing is what I claim asnew therein:

1. In a sheet-metal radiator, constructed of two tubular members placedone within the other with a chamber-space between them; means forconnecting adjacent edges of the respective members, which consists in afilling-piece having a tongue-and-groove joint with the end of the innermember, formed with a shoulder projecting over said inner member toprevent disengagement with said joint, extended in an inclined directionoutwardly from said shoulder, a distance corresponding to the spacebetween the members, then extending parallel to the g axis of theradiator to form a tongue, and e' connected with the outer member`turned overlapping lip forming this line from an additional tube 16,bent at by an ina groove said outer meman inwardly-exforming ashoulwhich receives said tongue,

and having its outer wall extending with the inclined dlsengagement ofthe parts.

2. In a sheet-metal radiator, means for ccnnecting the opposed Walls ofadjacent units, consisting of the outwardly-projecting flanges formed onsaid walls, thimbles fitted within the openings, dared at their innerends to engage in said openings, bent radially outward at their outermeeting ends at such points as to cause them to abut against the outerends the walls, and formed with tongue and groove connection at theirradially-extending ends.

3. In a sheet-metal radiator, means for connecting the opposed walls ofadjacent units, consisting of the outwardly-projecting flanges walls,thimbles tted within the openings, ilared at their inner ends to engagein said openings, bent radially outward at theirouter meeting ends atsuch points as to cause them to abut against the outer ends of theflanges on the walls, and formed with Vtongue and groove connection attheir radially-extending ends, the outer wall of the groove being madeto overlap the outer edge of one of the flanges on the wall of themember to be connected.

4. In combination with a sheet-metal radiator, consisting of two tubularmembers placed one within the other, with a chamber .between them, toreceive a heating medium under pressure, and providing a central air-iIOO IIO

flue; a circulating-passage connecting opposite points in the Wall ofthe inner member extending across air-heating flue, and sustaining thewalls of the inner member against pressure of the heating medium; saidcirculating-passage being constructed of a tube formed withradially-extending but inwardlyopening grooves at its respective ends,connected to the Walls of the inner member by radially-extending lipsformed around openings in said inner member and fitting in the groovesof the tube, whereby the parts are made to abut and are locked togetherin both directions.

5. In a sheet metal radiator constructed WILLIAM R. KINNEAR.

In presence of J. GREEN,

HARRY E. KNIGHT.

